glGetShaderSource method
Implementation
void glGetShaderSource(
  int shader,
  int bufSize,
  ffi.Pointer<ffi.Int32> length,
  ffi.Pointer<ffi.Int8> source,
) {
  return (_glGetShaderSource ??=
      _dylib.lookupFunction<_c_glGetShaderSource, _dart_glGetShaderSource>(
          'glGetShaderSource'))(
    shader,
    bufSize,
    length,
    source,
  );
}